ATE295999T1 - DEVICE AND METHOD FOR CORRELATION TIME SELECTION IN RAKE RECEIVER - Google Patents

DEVICE AND METHOD FOR CORRELATION TIME SELECTION IN RAKE RECEIVER

Info

Publication number
ATE295999T1
ATE295999T1 AT00959379T AT00959379T ATE295999T1 AT E295999 T1 ATE295999 T1 AT E295999T1 AT 00959379 T AT00959379 T AT 00959379T AT 00959379 T AT00959379 T AT 00959379T AT E295999 T1 ATE295999 T1 AT E295999T1
Authority
AT
Austria
Prior art keywords
signal
correlation
correlation times
multipath components
rake receiver
Prior art date
Application number
AT00959379T
Other languages
German (de)
Inventor
Tony Ottosson
Yi-Pin Eric Wang
Gregory Edward Bottomley
Original Assignee
Ericsson Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Inc filed Critical Ericsson Inc
Application granted granted Critical
Publication of ATE295999T1 publication Critical patent/ATE295999T1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709727—GRAKE type RAKE receivers

Abstract

Correlation times for a RAKE receiver are determined from time differentials between multipath components of a received signal based on correlation metrics, preferably signal strength measurements, associated with the multipath components. According to various embodiments of the present invention, selection strategies are employed in which "desired signal collecting" and "interference collecting" correlation times may be selected using average optimal (AO) or instantaneous optimal (IO) selection criteria. These criteria may include, for example, thresholds for signal strengths associated with multipath components of a signal at the correlation times, where the signal strengths may include absolute or relative measures of signal power or signal to noise ratio. According to alternative embodiments, correlation times are selected using an inverse filter of an estimated channel response. Related apparatus is also described.
AT00959379T 1999-10-19 2000-08-24 DEVICE AND METHOD FOR CORRELATION TIME SELECTION IN RAKE RECEIVER ATE295999T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/420,957 US6683924B1 (en) 1999-10-19 1999-10-19 Apparatus and methods for selective correlation timing in rake receivers
PCT/US2000/023297 WO2001029982A1 (en) 1999-10-19 2000-08-24 Apparatus and method for selection of correlation timing in rake receivers

Publications (1)

Publication Number Publication Date
ATE295999T1 true ATE295999T1 (en) 2005-06-15

Family

ID=23668566

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00959379T ATE295999T1 (en) 1999-10-19 2000-08-24 DEVICE AND METHOD FOR CORRELATION TIME SELECTION IN RAKE RECEIVER

Country Status (8)

Country Link
US (1) US6683924B1 (en)
EP (1) EP1222747B1 (en)
JP (1) JP4559002B2 (en)
CN (1) CN100449956C (en)
AT (1) ATE295999T1 (en)
AU (1) AU7071300A (en)
DE (1) DE60020256D1 (en)
WO (1) WO2001029982A1 (en)

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Also Published As

Publication number Publication date
JP2003512758A (en) 2003-04-02
AU7071300A (en) 2001-04-30
EP1222747B1 (en) 2005-05-18
JP4559002B2 (en) 2010-10-06
WO2001029982A1 (en) 2001-04-26
DE60020256D1 (en) 2005-06-23
CN1411635A (en) 2003-04-16
EP1222747A1 (en) 2002-07-17
CN100449956C (en) 2009-01-07
US6683924B1 (en) 2004-01-27

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